共 40 条
Synthesis and electrochemical study of Zr-doped Li[Li0.2Mn0.54Ni0.13Co0.13]O2 as cathode material for Li-ion battery
被引:149
作者:

Chen, Hao
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Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China

Hu, Qiyang
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Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China

Huang, Zimo
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Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China

He, Zhenjiang
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Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China

Wang, Zhixing
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Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China

Guo, Huajun
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Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China

Li, Xinhai
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h-index: 0
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Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China
机构:
[1] Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China
关键词:
Lithium ion battery;
Cathode material;
Zr-doping;
LITHIUM;
PERFORMANCE;
LI1.2MN0.54CO0.13NI0.13O2;
LIMN1/3NI1/3CO1/3O2;
SUBSTITUTION;
BEHAVIOR;
X=0;
D O I:
10.1016/j.ceramint.2015.08.104
中图分类号:
TQ174 [陶瓷工业];
TB3 [工程材料学];
学科分类号:
0805 ;
080502 ;
摘要:
Li[Li0.2Mn0.54Ni0.13Co0.13]O-2 materials doped with different Zr contents are studied using X-ray diffractometry (XRD), energy dispersive X-ray analysis (EDX), scanning electron microscopy (SEM), charge discharge measurements, AC impedance spectroscopy as well as cyclic voltammetry. These results demonstrate that the element Zr is distributed uniformly in these materials. With the increase of Zr content, the lattice parameters a, c and lattice volume V become larger. The discharge cycling curves of cells show that Zr doping enhances cycle life compared with the undoped one. The sample with x=0.01 shows the highest capacity and best cycling performance, especially at high current density. The Li[Li0.2Mn0.54-x/3Ni0.13-x/3Co0.13-x/3Zrx]O-2 (x=0.01) delivers a capacity of 133.6 mA h g(-1) (after 100 cycles) at the current density of 250 mA g(-1), corresponding to the capacity retention of 83.8%. The favorable performance of the doped samples could be attributed to its enhanced structural stability and Li+ mobility. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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页码:263 / 269
页数:7
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